Most Influential 2021: Polynetwork Hacker
For educating us on the difference between “hack” and “exploit.”

There is still much that is unknown about the largest decentralized finance (DeFi) security breach to date, the sophisticated attack that drained $600 million worth of cryptocurrencies from the China-based PolyNetwork, including the identity of the “hacker” (or hackers) and their underlying motivations. It was a story that riveted the industry, in part because the “Polynetwork hacker” ultimately returned all the stolen funds while communicating with the public the whole way through.
The article is part of CoinDesk’s 2021 Most Influential list.
“Mr. White Hat,” as the hacker referred to themselves in one message, said they attacked the cross-blockchain platform to call attention to an unidentified vulnerability and always intended to return the funds (minus a small bug bounty). But it’s just as likely he/she/they were forced to do the right thing after several crypto exchanges and USDT stablecoin issuer moved to blacklist the funds.
Additional context: The crypto industry differentiates between a “hack,” which means breaking into a system, and an “exploit,” which leverages or makes vulnerable existing code.

More For You
KuCoin Hits Record Market Share as 2025 Volumes Outpace Crypto Market

KuCoin captured a record share of centralised exchange volume in 2025, with more than $1.25tn traded as its volumes grew faster than the wider crypto market.
What to know:
- KuCoin recorded over $1.25 trillion in total trading volume in 2025, equivalent to an average of roughly $114 billion per month, marking its strongest year on record.
- This performance translated into an all-time high share of centralised exchange volume, as KuCoin’s activity expanded faster than aggregate CEX volumes, which slowed during periods of lower market volatility.
- Spot and derivatives volumes were evenly split, each exceeding $500 billion for the year, signalling broad-based usage rather than reliance on a single product line.
- Altcoins accounted for the majority of trading activity, reinforcing KuCoin’s role as a primary liquidity venue beyond BTC and ETH at a time when majors saw more muted turnover.
- Even as overall crypto volumes softened mid-year, KuCoin maintained elevated baseline activity, indicating structurally higher user engagement rather than short-lived volume spikes.
More For You
Deus X CEO Tim Grant: We aren't replacing finance; we're integrating it

The Deus X CEO discussed his journey into digital assets, the company's infrastructure-led growth strategy, and why his Consensus Hong Kong panel promises "real talk only."
What to know:
- Tim Grant entered crypto in 2015 after early exposure to Ripple and Coinbase, drawn by blockchain’s ability to improve traditional finance rather than replace it.
- Deus X combines investing and operating to build regulated digital finance infrastructure across payments, prime services, and institutional DeFi.
- Grant will be speaking at Consensus Hong Kong in February.












